John Legend wasted no time in getting back to his newborn son after his performance at the 2018 Billboard Awards.

The singer, who welcomed his second child with wife Chrissy Teigen , filmed himself at the airport minutes after walking off stage.

Legend, 39, managed to squeeze in an emotional rendition of his new hit A Good Night at the star-studded ceremony in Las Vegas.

Teigen, 32, was taking care the couple's children, two-year-old Luna and newborn Miles, at their home in Los Angeles.

The singer headed straight home to his family (Image: WENN.com)

The model tweeted her husband during his performance.

Along with a video of Legend on stage, she wrote: "Hello it's shortrib night be home by 9."

After his performance, Legend replied, filming himself at the airport and saying he would be home by 8pm.

During Legend's performance, Teigen poked fun at her husband being in Las Vegas days after she had given birth.

She wrote: "Wow didn't u just have a baby John smh go take care of it !!!!!! disgusting."

Earlier in the day, Chrissy finally revealed their baby boy's name.

Their second child - and first son - was born last week "a few weeks early", so the couple were taken a little by surprise.

Fans demand that Chrissy (pregnant with her second baby with husband John Legend) share the truth (Image: FilmMagic)

As a result, the newborn had to wait a few days for his name.

But yesterday, model Chrissy shared a picture of him on Instagram, revealing that the had named him Miles.

"Hello, world! This is Miles Theodore Stephens - We are drowning in his little peeps and nuzzles," she captioned the cute shot.

"Our household feels overwhelmed with love. Thank you for all your well wishes!"

Little Miles joins older sister Luna in the Teigen-Legend household.

Chrissy has already been making jokes about her labour, oversharing that she hadn't torn this time around.

"I can confirm postpartum life is 90% better when you don't rip to your butthole. Baby boy: 1 point. Luna: 0," she tweeted at the weekend.

And of her newborn son, she revealed that Miles has the "same nose" as Luna.

(Image: AFP)

"He is a few weeks early so he’s litttttttle and makes the teeniest noises. We are in love," she wrote.

Chrissy and John had announced they were expecting a baby boy back in January.

Sharing a baby scan on Instagram following the Grammy Awards, Chrissy wrote: "Mama and her baby boy."

They first announced they were expecting their second child last November, and roped in Luna to reveal the happy news in a sweet video as she stroked her mum's tummy.

At the end of April, Chrissy was thrown a lavish baby shower that was attended by the likes of Kim Kardashian, Kanye West and Kris Jenner.

(Image: Instagram/chrissyteigen)

Guests feasted on milkshakes and burgers from Shake Shack as well as mountains of cake, while John provided the musical entertainment behind the piano.

Chrissy and singer John welcomed their daughter in April 2016.

The star later opened up about her struggles with post-natal depression following the birth.

The model revealed she had a downward spiral, and barely left the house as a new mum, battling emotional outbursts that worried her family and friends.

(Image: johnlegend/Instagram)

Chrissy puckered up with Luna in another photo (Image: chrissyteigen/Instagram)

Penning an honest article for Glamour magazine, she explained how she suffered mood swings and lost her appetite, and said even getting out of bed was painful as she doubted whether she should be a parent.

"One thing that really got me was just how short I was with people... I couldn’t figure out why I was so unhappy," she wrote.

"I blamed it on being tired and possibly growing out of the role: 'Maybe I’m just not a goofy person anymore. Maybe I’m just supposed to be a mom...' "

Chrissy said she went to see her doctor, and took antidepressants after being diagnosed with anxiety and postpartum depression - and said she was also considering therapy.